CN106940448A - A kind of Uranium enrichment plant's separative power on-line monitoring method - Google Patents
A kind of Uranium enrichment plant's separative power on-line monitoring method Download PDFInfo
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- CN106940448A CN106940448A CN201710007007.XA CN201710007007A CN106940448A CN 106940448 A CN106940448 A CN 106940448A CN 201710007007 A CN201710007007 A CN 201710007007A CN 106940448 A CN106940448 A CN 106940448A
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- uranium enrichment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
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Abstract
The present invention relates to a kind of metering method of uranium enrichment separative power.To realize the on-line monitoring of Uranium enrichment plant's separative power, simplify measuring apparatus, the invention provides a kind of Uranium enrichment plant's separative power on-line monitoring method, comprise the following steps：First, parameter to be measured is chosen；2nd, vacuum leak hunting is carried out to measuring apparatus；3rd, measuring apparatus is connected on process pipe；4th, sample-out count and scale are carried out to measuring apparatus；5th, the measured value of parameter to be measured is obtained in real time, and the value of unknown parameter is calculated by conservation equation；6th, the value of separation potential function is calculated；7th, calculated by separative power computing formula and obtain separative power, realize on-line monitoring.Equipment needed for the monitoring method of the present invention is able to obvious simplification, cost is significantly reduced, it can realize that the production technology situation of Uranium enrichment plant is monitored in real time to account in real time with nuclear material, the uranium enrichment production activity that whether can have promise breaking for monitoring Uranium enrichment plant provides effective Monitoring Data.
Description
Technical field
The present invention relates to a kind of metering method of uranium enrichment separative power, more particularly to a kind of Uranium enrichment plant's separative power exists
Line monitoring method.
Background technology
Uranium enrichment plant is the nuclear facilities for producing enriched uranium, is one of most sensitive facility of nuclear fuel cycle, is to obtain nuclear weapon
One of key facility of device, therefore verify the main monitoring object with international nuclear safeguards as arms control.
The work of separation is the core index of Uranium enrichment plant and centrifuge, and it is defined as：A certain amount of uranium enrichment to necessarily235U
The workload of input required for abundance, its unit is：t·SWU；And the work of separation produced by the unit interval is the work of separation
Rate, its separating power (or production capacity) to measure a separative element (or cascade), its unit is：t·SWU/a.
Pass through the monitoring to separative power, it is possible to achieve the production technology condition monitoring and nuclear material accountancy core of Uranium enrichment plant
It is real, and to Uranium enrichment plant's work of separation declared value and the verification of design alteration, can know whether Uranium enrichment plant has the uranium of promise breaking
Production activity is concentrated, for effectively preventing the illegal transfer of uranium enrichment ability and using with important value.
Open source information shows that the monitoring of Uranium enrichment plant's separative power mainly uses following scheme：First, weighing-appliance is utilized
Weigh a period of time (for example respectively：Three months) the interior concentration UF produced6, feed UF6With lean UF6Quality, so as to be somebody's turn to do
Corresponding each several part uranium quality in period；Then, respectively to concentration UF6, feed UF6With lean UF6It is sampled, utilizes gas
Body mass spectrograph is measured to each sample, obtains the concentration UF of production in the period6, consumption feed UF6With the lean of generation
UF6's235U abundance；Finally, by above-mentioned measured value (uranium quality and235U abundance) substitute into relevant formula and calculated to be separated
Power.All multioperations however, the program needs to be weighed, samples, measures etc., and need to use gas mass spectrometer is this must
The complicated and expensive instrument that must be operated by professional and technical personnel, therefore there is high cost, efficiency is low, the defect such as complex operation,
Most of all, the program can not carry out the on-line real time monitoring of separative power, it is impossible to realize production technology real-time monitoring and
Nuclear material accounts verification.
Theoretically, to realize the on-line monitoring of Uranium enrichment plant's separative power, it is necessary to obtain relevant process duct in real time
UF in road6Gas235U abundance and corresponding mass flow, the real-time processing by data handling system are that separation can be achieved
The on-line monitoring of power.
For UF6Gas235The real-time measurement of U abundance, it mainly includes two parts, i.e.,：UF6In gas235The survey of U contents
The measurement of amount and total uranium amount, the ratio of the two is UF6Gas235U abundance.Wherein, UF6In gas235U contents can be used
NaI (Tl) detector pair235The Characteristic γ ray of U transmittings measures to obtain.And the measurement of total uranium amount can use following three
Plant method, i.e. x-ray fluorescence method, transmission source damped system and equation of gas state method.
For UF6The real-time measurement of gas mass flow, is generally mainly realized using orifice flowmeter.UF6Gas is flowed through
Draught head can be produced before and after aperture in orifice flowmeter, orifice plate, as the UF for flowing through orifice plate6When the speed of gas reaches the velocity of sound,
Gas mass flow by orifice plate only will be directly proportional to the gas pressure intensity before orifice plate, therefore by the gas pressure intensity before orifice plate and hole
Plate coefficient is that can obtain UF6Gas mass flow.In addition, also having using external neutrons source to UF6Gas carries out neutron activation, so
The delay gamma-rays of the fission fragment of generation is measured afterwards, by determining that delay gamma intensity, neutron association in time obtain air-flow
Speed, and then obtain UF6The measuring method of gas mass flow, but this method is complex, need to use neutron source, measurement error
Greatly, about 25%.
Based on above-mentioned technical foundation, the on-line monitoring of Uranium enrichment plant's separative power can be by obtaining feed UF6, concentration UF6
With lean UF6's2356 real time datas of U abundance and mass flow simultaneously carry out real time data processing to realize.But, due to each
Real time data is required to a set of relatively independent measuring apparatus and measured, and 6 real time datas are accomplished by 6 sets of measuring apparatus, because
This causes required equipment complicated, and cost is higher.Certainly, the above-mentioned technical concept on Uranium enrichment plant separative power on-line monitoring is only
It is that the general reasoning based on those of ordinary skill is drawn, and for the on-line monitoring of actual Uranium enrichment plant's separative power,
Having not yet to see domestic and foreign literature has open report.
The content of the invention
To realize the on-line monitoring of Uranium enrichment plant's separative power, simplify measuring apparatus, the invention provides a kind of uranium enrichment
Factory's separative power on-line monitoring method.The monitoring method comprises the following steps：
(1) according to the concrete condition of Uranium enrichment plant, by being fed UF6, concentration UF6With lean UF6's235U abundance and quality stream
4, which are chosen, in 6 parameters of amount is used as parameter to be measured；
(2) according to the 4 of selection parameter setting measuring apparatus to be measured, vacuum leak hunting is carried out to the measuring apparatus set；
(3) measuring apparatus is connected on the relevant process pipe of Uranium enrichment plant；
(4) sample-out count and scale are carried out to measuring apparatus；
(5) measuring apparatus is opened, the measured value of above-mentioned 4 parameters to be measured is obtained in real time, and this 4 measured values are substituted into
Conservation equation FEF=WEW+PEPThe equation group constituted with F=W+P, calculates the value of other 2 parameters to be measured；
(6) by EP、EWAnd EFSubstitute into separation potential function in real time respectivelySeparated respectively
Potential function V (EP)、V(EW) and V (EF) value；
(7) and then separative power computing formula Δ U=PV (E are passed throughP)+WV(EW)-FV(EF) calculate obtain Uranium enrichment plant
Separative power, realize on-line monitoring；
Step (5) is into step (7), and P, W and F are respectively concentration UF6, lean UF6With feed UF6Mass flow,
EP、EWAnd EFRespectively concentrate UF6, lean UF6With feed UF6's235U abundance, V (EP)、V(EW) and V (EF) it is respectively concentration
UF6, lean UF6With feed UF6Separation potential function, E represents UF6's235U abundance.
If being fed UF6Uranium abundance be natural uranium abundance, then only need obtain except feed UF6's2353 beyond U abundance
Parameter is used as parameter to be measured.
The measuring apparatus is preferred including NaI (Tl) detector, to realize to UF6's235The measurement of U abundance.
The measuring apparatus is calculated as preferably including orifice flow, to realize to UF6Mass flow measurement.
The main technical principle of the present invention is as follows：Cascade is entirely concentrated with the Uranium enrichment plant normally run or work is necessarily concentrated
Skill section is object, its whole external parameter conservation, and conservation equation is：FEF=WEW+PEPAnd F=W+P, due to the two conservations
Equation may be constructed equation group, as long as therefore obtain four independent parameters mutually, it is possible to obtain remaining two parameters.So
Afterwards, the separative power of Uranium enrichment plant can be calculated using separating potential function and separative power computing formula.
In summary, Uranium enrichment plant's separative power on-line monitoring method of the invention is due to only needing acquisition 4 in real time to treat
Parameter is surveyed, therefore for the technical scheme for needing 6 real time datas in theory, its required equipment is able to obvious simplification,
Cost is significantly reduced.By monitoring Uranium enrichment plant's separative power on-line, it is possible to achieve the production technology situation of Uranium enrichment plant is real-time
Monitoring and nuclear material are accounted in real time, and Uranium enrichment plant's production technology operation conditions can be reflected in time, are conducive to Uranium enrichment plant stable
Safe operation, the uranium enrichment production activity that whether can have promise breaking for monitoring Uranium enrichment plant provides effective Monitoring Data, for having
Effect prevents the illegal transfer of uranium enrichment ability and using with important value.In addition, Uranium enrichment plant's separative power on-line monitoring is also
Optimization design can be joined for centrifugal stage and production technology adjustment provides monitoring means and technical support, Uranium enrichment plant is improved to reach
The purpose of economic benefit；In terms of the monitoring that centrifuge performance and spoilage can also be applied to.
Brief description of the drawings
Uranium enrichment plant's separative power on-line monitoring method practical situations schematic diagram of Fig. 1 present invention.
17 days continuous online monitoring datas of Uranium enrichment plant's separative power of Fig. 2 embodiment of the present invention 1.
Reference：1. it is fed UF6, 2. concentration UF6, 3. lean UF6, 4. concentration technology sections, 5. feed UF6's235U is rich
Spend optional measurement point, 6. feed UF6The optional measurement point of mass flow, 7. concentration UF6's235The optional measurement point of U abundance, 8. concentrations
UF6The optional measurement point of mass flow, 9. lean UF6's235The optional measurement point of U abundance, 10. lean UF6Mass flow it is optional
Measurement point, 11. data handling systems.
Embodiment
Embodiments of the present invention are described further with reference to specific embodiment.
Embodiment 1
Uranium enrichment plant's separative power on-line monitoring method of the present invention is applied to certain Uranium enrichment plant, its monitoring process includes
Following steps：
(1) according to the concrete condition of the Uranium enrichment plant, concentration UF is chosen first6Mass flow be used as parameter to be measured；By
In feed UF6Uranium concentration be natural uranium concentration, therefore again choose concentration UF6With lean UF6's235U abundance is used as parameter to be measured；
(2) according to the 3 of selection parameter setting measuring apparatus to be measured, including 2 NaI (Tl) detectors and 1 orifice plate stream
Gauge, vacuum leak hunting is carried out to the measuring apparatus set；
(3) measuring apparatus is connected on the relevant process pipe of Uranium enrichment plant；
(4) sample-out count and scale are carried out to measuring apparatus；
(5) open measuring apparatus, obtain the measured value of above-mentioned 3 parameters to be measured in real time, and by this 3 measured values and
It is fed UF6Natural uranium abundance substitute into conservation equation FEF=WEW+PEPThe equation group constituted with F=W+P, calculates other 2
The value of parameter to be measured；
(6) by EP、EWAnd EFSubstitute into separation potential function in real time respectivelySeparated respectively
Potential function V (EP)、V(EW) and V (EF) value；
(7) and then separative power computing formula Δ U=PV (E are passed throughP)+WV(EW)-FV(EF) calculate obtain Uranium enrichment plant
Separative power, realize on-line monitoring.
Step (5) is into step (7), and each processing about data uses the data handling system based on computer
Completion.
During accompanying drawing 2 is 17 days continuous online monitoring datas of Uranium enrichment plant's separative power of the present embodiment, monitoring process, often
1.6h obtains a Monitoring Data.Monitoring result is shown：The Uranium enrichment plant separative power of continuous 17 days monitors average value
528.89tSWU/a, relative deviation≤2.0% with factory's declared value (518.36tSWU/a).Separative power on-line monitoring value
Relative standard deviation is 1%, and the separative power numerical value monitored is not steady state value, but in continuous fluctuating change, this represent
The actual process running situation of Uranium enrichment plant is different from the constant ideal technology of separative power, the reality for factory of preferably having coincide
Operating mode, fully shows the validity of Uranium enrichment plant's separative power on-line monitoring method of the present invention.
So far, Uranium enrichment plant's separative power on-line monitoring method of the invention applies number in Uranium enrichment plant
Year, achieve good effect.
Claims (4)
1. a kind of Uranium enrichment plant's separative power on-line monitoring method, it is characterised in that the monitoring method comprises the following steps：
(1) according to the concrete condition of Uranium enrichment plant, by being fed UF6, concentration UF6With lean UF6's235U abundance and mass flow 6
4, which are chosen, in individual parameter is used as parameter to be measured；
(2) according to the 4 of selection parameter setting measuring apparatus to be measured, vacuum leak hunting is carried out to the measuring apparatus set；
(3) measuring apparatus is connected on the relevant process pipe of Uranium enrichment plant；
(4) sample-out count and scale are carried out to measuring apparatus；
(5) measuring apparatus is opened, the measured value of above-mentioned 4 parameters to be measured is obtained in real time, and this 4 measured values are substituted into conservation
Equation FEF=WEW+PEPThe equation group constituted with F=W+P, calculates the value of other 2 parameters to be measured；
(6) by EP、EWAnd EFSubstitute into separation potential function in real time respectivelySeparation potential letter is obtained respectively
Number V (EP)、V(EW) and V (EF) value；
(7) and then separative power computing formula Δ U=PV (E are passed throughP)+WV(EW)-FV(EF) calculate point for obtaining Uranium enrichment plant
From power, on-line monitoring is realized；
Step (5) is into step (7), and P, W and F are respectively concentration UF6, lean UF6With feed UF6Mass flow, EP、EWWith
EFRespectively concentrate UF6, lean UF6With feed UF6's235U abundance, V (EP)、V(EW) and V (EF) it is respectively concentration UF6, lean
UF6With feed UF6Separation potential function, E represents UF6's235U abundance.
2. Uranium enrichment plant's separative power on-line monitoring method as claimed in claim 1, it is characterised in that：If being fed UF6Uranium it is rich
Spend for natural uranium abundance, then only need to obtain except feed UF6's2353 parameters beyond U abundance are used as parameter to be measured.
3. Uranium enrichment plant's separative power on-line monitoring method as claimed in claim 1, it is characterised in that：The measuring apparatus bag
Include NaI (Tl) detector.
4. Uranium enrichment plant's separative power on-line monitoring method as claimed in claim 1, it is characterised in that：The measuring apparatus bag
Include orifice flowmeter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108919334A (en) * | 2018-08-22 | 2018-11-30 | 中国原子能科学研究院 | A kind of UF6The verification measurement method of uranium quality and abundance in big tank |
| CN109916644A (en) * | 2017-12-13 | 2019-06-21 | 中核兰州铀浓缩有限公司 | It is centrifuged uranium enrichment process system ftercompction machine electromechanics experimental rig |
| CN111666655A (en) * | 2020-05-08 | 2020-09-15 | 中国辐射防护研究院 | Method for calculating uranium hexafluoride leakage source item |
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| US20060050845A1 (en) * | 2004-09-03 | 2006-03-09 | Juni Jack E | Nuclear medical imaging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916644A (en) * | 2017-12-13 | 2019-06-21 | 中核兰州铀浓缩有限公司 | It is centrifuged uranium enrichment process system ftercompction machine electromechanics experimental rig |
| CN108919334A (en) * | 2018-08-22 | 2018-11-30 | 中国原子能科学研究院 | A kind of UF6The verification measurement method of uranium quality and abundance in big tank |
| CN111666655A (en) * | 2020-05-08 | 2020-09-15 | 中国辐射防护研究院 | Method for calculating uranium hexafluoride leakage source item |
| CN111666655B (en) * | 2020-05-08 | 2023-07-14 | 中国辐射防护研究院 | Calculation method of uranium hexafluoride leakage source term |
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Application publication date: 20170711 |